@article{SM_2008_199_10_a1,
     author = {I. Sh. Kalimullin},
     title = {Almost computably enumerable families of sets},
     journal = {Sbornik. Mathematics},
     pages = {1451--1458},
     publisher = {mathdoc},
     volume = {199},
     number = {10},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_10_a1/}
}